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Last ditch check for partition on raw disk.

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Some storage devices can be formatted as bare partitions, without an
MBR or GPT header.  If we found no partitions, try poking at the raw
disk, and treat it as a public volume if we found a valid filesystem.

Bug: 20503551
Change-Id: I80304e1ad865435321c341b667c0daf2daf4d56c
This commit is contained in:
Jeff Sharkey 2015-06-26 11:16:14 -07:00
parent 66270a21df
commit 63123c067a
1 changed files with 8 additions and 6 deletions
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14
Disk.cpp
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@ -36,8 +36,6 @@
#include <sys/stat.h>
#include <sys/mount.h>
#define ENTIRE_DEVICE_FALLBACK 0
using android::base::ReadFileToString;
using android::base::WriteStringToFile;
using android::base::StringPrintf;
@ -306,14 +304,18 @@ status_t Disk::readPartitions() {
}
}
#if ENTIRE_DEVICE_FALLBACK
// Ugly last ditch effort, treat entire disk as partition
if (table == Table::kUnknown || !foundParts) {
// TODO: use blkid to confirm filesystem before doing this
LOG(WARNING) << mId << " has unknown partition table; trying entire device";
createPublicVolume(mDevice);
std::string fsType;
std::string unused;
if (ReadMetadataUntrusted(mDevPath, fsType, unused, unused) == OK) {
createPublicVolume(mDevice);
} else {
LOG(WARNING) << mId << " failed to identify, giving up";
}
}
#endif
notifyEvent(ResponseCode::DiskScanned);
mJustPartitioned = false;